Nortel Passport 15000, Hardware Installation And Maintenance, Page: 218 / 874

218 Chapter 15 Shelf assembly
241-1501-240 5.2S2
Shelf assembly replacement
Replace a shelf assembly to restore the operation of a card or module slot that
is out of service because of one or more bent pins.
• “Prerequisites to shelf assembly replacement” (page 218)
• “Task flow of a shelf assembly replacement” (page 219)
Prerequisites to shelf assembly replacement
• Replacing a shelf assembly requires the Passport 15000 or 20000 to be
removed from service. The minimum estimated down time from power-
down to power-up for a Passport 15000 and 20000 is 1 hour and
15 minutes. Anticipate a 2-hour window of activities to allow a sufficient
margin to handle all hardware. The estimate excludes the time to power
up the system. The duration depends on:
— one person doing most of the activities and is experienced working
on a Passport 15000 or 20000
— a helper assisting with the steps to remove and insert an empty shelf
assembly itself because a Passport 15000 weighs about 99 kg
(218 lbs) and a Passport 20000 weighs about 34 kg (74 lbs)
— having all temporary ESD-protection storage containers at hand
— having no delays or problems with any of the procedure steps
• Minimize the impact of downtime by beginning the replacement during
the period of lowest average traffic for the node.
• When returning a Passport 15000 or 20000, the rear modules must
remain installed. A replacement shelf assembly includes the following
rear modules installed at the factory:
CAUTION
Risk of prevented service
The CPs and FPs are configured in software according to
specific slot numbers. For the software to operate again,
each card must be returned to the same slot it came from.
Otherwise, the Passport 15000 or 20000 or portions of it
may not return to service. Record your card locations.